When considering the potential impacts of climate change in forests, researchers need examples. Whether the questions are ecological, biological, physical, economic, or social, our predictions concerning forest change become clearer if we have some experience from the real world to provide a basis for comparison. This catalog of tree provenance trials represents an effort to present that sort of information in an accessible format, for Canadian and adjacent parts of the US. Researchers interested in ‘assisted migration’, ‘managed translocation’, ‘enrichment planting’ and overall long-term impacts of climates on various tree species and provenances will hopefully find this catalog to be a useful guide to locating further information. There are likely many other trials that could be included in a more fulsome database; this catalog differs by presenting an overview of trials in summary format. By browsing the entries and seeing what might be readily available with further contacts and examination of existing data and records, we hope that researchers in climate change adaptation will be able to discover trials pertinent to their research that might otherwise go unnoticed.